JPS5825968B2 - Weighing printing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a weighing printing device that prints weighing data and issues weighing labels.

2. Description of the Related Art In general, a weighing printing device is known that prints weighing data measured using an electronic scale using a link and automatically issues a weighing label.

For example, a product is weighed using an electronic price scale, in which a calculation unit calculates the selling price of the weighed product based on the measured value of the product weighed in the scale unit, and the product's measurement data, i.e., weight, unit price, and sales price. A measuring printing device is known that automatically issues a sales label by printing the following information using a label printer.

By the way, in such a device, if you set the weighing label to be automatically issued, if you place the object to be weighed on the weighing pan of the electronic scaler, the scale may move due to the influence of wind or vibration. The weighing data measured with the scale changes, and the object to be weighed on the weighing pan is reweighed, so each time the weighing data changes, the label printer issues a weighing label, resulting in one object being weighed. There was a problem in that several weighing labels were issued for each weighing item.

Additionally, when weighing a large number of items quickly one after the other, it is generally done by leaving the already weighed item on the weighing pan and placing the next item on it, then removing the weighed item and weighing the next item. In order to quickly weigh a large number of items, the weighing and printing device also places such a labeled item on top of the next item, then removes the labeled item and weighs the next item. It is necessary to be able to perform labeling.

Conventionally, in order to solve this problem, once a label printer prints one label, it does not print the next label unless the weighing data fluctuates by more than a preset amount. This eliminates the issue of unnecessary labels due to the influence of weight loss, and also eliminates restrictions on the method of placing objects to be weighed on the weighing pan, making it extremely easy to handle and quick to label. A device that can do this is being considered.

However, with these types of devices, the next label is not issued unless the calculated data fluctuates beyond a preset amount of variation, so if the weight of the object to be weighed is within the preset amount of variation. In this case, there is a problem in that it is not possible to automatically issue a weighing label for the object to be weighed.

In other words, for example, the amount of variation in measurement data can be detected using 4bis.
When using a U/D count of t, a fluctuation amount of ±8 pulses is suitable for detection with one IC.

Therefore, if the amount of variation is set to ±8 pulses, 10ky/
1/1000 scale of 10,9 is ±8 pulses - ±8
0g, and there is a problem that labels cannot be automatically issued for items weighing less than 80g.

This invention was devised in view of these problems, and once the measurement data has been printed out, it is prohibited to print out the measurement data unless the measurement data fluctuates by a certain amount or more. To provide a metric printing device capable of improving practicality by printing out the metric data when the metric data becomes stable regardless of the amount of variation once the metric data returns to zero.

Another object of the present invention is to provide a metric printing device which can cancel the printing prohibition function of metric data within a set variation amount by changing a switch, thereby improving its versatility.

This invention counts the measurement pulse signals output from the scale part, and when the count value reaches a preset value, outputs a fluctuation amount detection signal, and the count contents are cleared by the printing operation of the printer, and the fluctuation amount detection signal is output. A variation detection circuit whose output is stopped, a detection circuit which detects when the weighing data becomes zero and outputs a zero detection signal, and which stops outputting the zero detection signal due to the printing operation of the printer; a timer circuit that times up when the weighing pulse signal from the section is not output continuously for a certain period of time, and a non-zero detection signal output means that outputs a non-zero detection signal when the weighing data is other than zero, When outputs of the fluctuation amount detection signal or the zero detection signal, the time-up signal, and the non-zero detection signal match, a print command is generated to cause the printer to print the weighing data. be.

Further, the present invention further includes a changeover switch for prohibiting the fluctuation amount detection operation of the fluctuation amount detection circuit.

An embodiment of the present invention will be described below with reference to the drawings.

A scale unit (not shown) that weighs the object to be weighed, such as a product, and outputs the weight value as a pulse signal, and also outputs an increase or decrease in the weight value by distinguishing it into a count-up pulse signal CU and a count-down pulse signal CD. ) are input to the measurement data output means.

The measurement data output means is a differentiation circuit IU. ID, OR gate 2, reversible counter 3, up-count/down-count switching flip-flop 4, AND gate 5U, 5
D1 is formed by a positive/negative judgment flip-flop 6, a parallel-to-serial converter 7, and an arithmetic circuit 8, and differentiates the count-up pulse signal CU and count-down pulse signal CD from the scale section by differentiating circuits IU and ID, respectively. Differential signals CU' and CD' are output in response to the falling edges of the pulse signals CU and CD, and are collectively input to the count signal input terminal CP of the reversible counter 3 by the OR gate 2.

Moreover, both of the above pulse signals CU. CD is input to the flip-flop 4 for switching up and down counts, and is also input to the set terminal S and reset terminal R of the flip-flop 6 for positive/negative determination via AND gates 5U and 5D.

Then, to the other terminals of the AND gates 5U and 5D, a zero signal is output from the parallel-to-serial converter 7 which converts the parallel output of the reversible counter 3 into serial when the count content of the reversible counter 3 is "0". is input, and each time the count content of the reversible counter 3 reaches rOJ, the flip-flop 6 is set or reset by the next input count-up pulse signal CU or count-down pulse signal CD, and the flip-flop 6 is set or reset. Depending on the reset state, it is determined whether the count contents of the reversible counter 3 are positive or negative.

When the flip-flop 6 is set by inputting the set and reset outputs of the flip-flop 6 to the flip-flop 4, the flip-flop 4 is set by the count-up pulse signal CU;
The flip-flop 4 is reset by the count-up pulse signal CU, and when the flip-flop 6 is reset, the flip-flop 4 is reset by the count-up pulse signal CU, and the count-down pulse signal CD
Furthermore, the set output of the flip-flop 4 is input to the up/down count switching terminal U/D of the reversible counter 3, and when the flip-flop 4 is set, the set output of the flip-flop 4 is input to the up/down count switching terminal U/D of the reversible counter 3. counts up and when the flip-flop 4 is reset, the reversible counter 3 counts down.
The weight of the object to be weighed is counted by counting the absolute value of the difference in D.

Then, the parallel count output from the reversible counter 3 is converted into a serial signal by the parallel-to-serial converter 7 and inputted to the arithmetic circuit 8, and outputted to the arithmetic circuit 8 from a unit price setting key (not shown). unit price data signal T
D is input, and the arithmetic circuit 8 calculates the selling price of the object to be weighed from the weight and unit price.

Data such as the weight, unit price, and sales price of the object to be weighed outputted from the arithmetic circuit 8, that is, data signals of the weighing data, are inputted to the display circuit 9 and the label printer 10, respectively, to display and print the weighing data. That's what I do.

Further, a tare key signal F is input from a tare key (not shown) to the reset terminal R of the reversible counter 3, and when the tare key is operated, the count contents of the reversible counter 3 are reset. I also try to do some pulling.

On the other hand, when starting counting from "0", if the first count was an up count, normal up and down counts are performed, and if the first count was a down count, up and down counts are performed. A 4-bit reversible counter 11 is provided to count up and count the absolute value of the difference between the count-up pulse and the count-down pulse when counting is performed in reverse and starts counting from "O". The count up pulse signal CU and the count down pulse signal CD are connected to the count pulse input terminal CP of No. 11.
are combined by OR gate 12, inverted by NOT circuit 13,
The set output of the flip-flop 4 is inputted through the NOR gate 14 and the up-count/down-count switching terminal U/D.

Then, the output of each bit of the reversible counter 11 is
The bits from the 3rd bit to the 3rd bit are all processed by the NOR gate 15, and the 4th bit is sent to the NAND gate.
The output of the NAND gate 16 is input to the other terminal of the NOR gate 14 via the NAND gate 17, and is inverted by the NOT circuit 18 to preset the amount of variation in the weighing data. The reversible counter 11, OR gate 12, NOT circuit 13, NOR gates 14, 15,
The NAND gates 16, 17 and the NOT circuit 18 constitute a variation detection circuit.

In addition, a high logic level signal H and a low logic (ground) signal are connected to the other terminal of the NAND gate 17 via a changeover switch 19.
The level signal is selectively input.

Furthermore, the zero signal output from the parallel to serial converter 7 is input to the preset gate terminal PE of the reversible counter 11 and the preset input terminal P8 for the fourth bit, and the Each preset input terminal P1. P2. Ground P4 to zero level and NO
The R gate, the NAND gate 16, and the NOT circuit 18 constitute a zero detection circuit.

That is, the reversible counter 11. NOR gate 15, N
The AND gate 16 and NOT circuit 18 are shared by the fluctuation amount detection circuit and the zero detection circuit.

Further, a timer circuit 20 is provided which times up after a preset predetermined time and outputs a time-up signal, and the output signal of the OR gate 12 is input to the reset terminal R of this timer circuit 20.

Then, the output of the NAND gate 16 is connected to the NOT circuit 1.
8, the timer circuit 20
The time-up signal outputted by the flip-flop 6, the set output of the flip-flop 6, and the zero signal outputted from the parallel-to-serial converter 7 are connected to a NOT circuit 2 as a non-zero detection signal output means.
1 and the non-zero detection signal obtained by inverting at step 1 are input to an AND gate 22, and the output of the AND gate 22 is input to the label printer 10 as a print command PC, and the output of the label printer 10 is The printing operation signal PB is converted into a differential signal outputted in response to the rising edge of the signal via the differentiating circuit 23, and the differential signal is inputted to the reset terminal R of the reversible counter 11 as a reset signal. There is.

With such a configuration, the scale unit performs an operation of measuring the weight of the object to be weighed, the scale unit operates to perform a weighing operation, and the count up pulse signal CU is generated in accordance with the weighing operation.
When the count-up pulse signal CU and the count-down pulse signal CD are outputted, the reversible counter 3 counts up or down the count-up pulse signal CU and the count-down pulse signal CD, and the calculation circuit 8 performs calculation according to the count contents of the reversible counter 3. The weight, unit price, and sales price of the object to be weighed, that is, the product, weighed by the scale unit are displayed on the display circuit 9 and inputted to the label printer 10 as a print command.

On the other hand, at this time, if the selector switch 19 is switched to the high logic level side, the count up pulse signal CU and the count down pulse signal CD are output from the scale section as shown in the timing chart of each signal in FIG. 2A. Then, the reversible counter 11 counts the absolute value of the difference in the number of pulses between the number CU and the countdown pulse signal CD on the count up pulse '+, and the count number becomes '
8'', a NAND is established in the NAND gate 16, a NAND signal is output from the NAND gate 16, the NOR gate 14 is closed, and input of count pulses to the reversible counter 11 is prohibited, and the reversible counter 11 The counting operation of is stopped, and a variation detection signal K obtained by inverting the output of the NAND gate 16 by the NOT circuit 18 is input to the AND gate 22.

That is, when the scale section operates and the count-up pulse signal CU and the count-down pulse signal CD are output and the weighing data fluctuates, the reversible counter 11 performs a counting operation to detect the amount of variation in the weighing data, and the reversible When the count number of the counter 11 reaches "8", the NAND of the NAND gate 16 is established, and NOT
A variation detection signal K is output from the circuit 18.

In this way, when the scale section operates and the weighing data fluctuates, the amount of variation in the weighing data changes to a preset amount of variation, for example, 10 kg/10. ! If one pulse of the count-up pulse signal CU and count-down pulse signal CD is made to correspond to 10 g with a sharpness of 1/1000 of i', it will be detected whether the increase or decrease of the weighing data is greater than ±80 g. , the variation detection signal K is outputted and inputted to the AND gate 22 only when the variation amount detection signal K is large.

Further, as shown in FIG. 2B, when the count content of the reversible counter 3 reaches rOJ, that is, the weighing data becomes "
0", the parallel-to-serial converter 7 outputs a zero signal, thereby presetting each of the first to fourth bits of the reversible counter 11 to "00o1".
The count content becomes "8", the NAND of the NAND gate 16 is established, and the zero detection signal Z is output from the NOT circuit 18.
outputs.

In this way, when the weighing data becomes r01 or when it passes "O", that is, when the weighing data crosses "0", the zero detection signal Z is output regardless of the amount of variation in the weighing data, and the AND It is input to gate 22.

Further, when the count-up pulse signal CU or the count-down pulse signal CD is output from the scale part, the timer circuit 20 is reset, and when the output of both pulse signals CU and CD from the scale part stops for a predetermined time, the count-up starts. AND the output time-up signal
Input into game 122.

That is, when the scale section performs a metering operation, completes the metering operation, and comes to a standstill, the timer circuit 20 detects the stationary state, outputs a time-up signal, and inputs the time-up signal to the AND gate 22. .

Further, if the count content of the reversible counter 3 is not "0", that is, if the measurement data is not "O", a non-zero detection signal is sent from the parallel to serial converter 7 via the NOT circuit 21.
If the count content of the reversible counter 3 is not negative, that is, if the weighing data is not negative, the set output signal from the flip-flop 6 is input to the ND gate 22.
Input to ND gate 22.

Then, NAND of NAND gate 16 is established and NO
The T circuit 18 outputs a variation detection signal K or zero detection signal Z, the timer circuit 20 outputs a time-up signal, the NOT circuit 21 outputs a non-zero detection signal, and the flip-flop 6 outputs a set output signal. In other words, when the weighing data fluctuates more than ±80g or crosses "0", the weighing data is not "0" and is not negative, and the weighing operation of the scale part is completed. When the label comes to rest, a print command +PC is output from the AND gate 22, and the label printer 10 performs a printing operation to print out the weighing data inputted as print data.

Then, when the label printer 10 prints the weighing data and outputs the print operation signal PB from the label printer 10, the reversible counter 11 is reset and the output of the variation detection signal K or zero detection signal Z is stopped. and prepare for the next operation.

Therefore, when the selector switch 19 is switched to the high logic level side, when the scale operates and the weighing data fluctuates, the weighing data crosses "0" or crosses "O". If it does not cross rOJ, it is detected whether the amount of variation is larger than the preset amount of variation ±80g, and whether the measurement data crosses rOJ or the amount of variation is larger than the preset amount of variation ±80g. It is possible to have the label printer 10 print the weighing data only when the label printer 10 is used.

In other words, if there is no object to be weighed on the weighing pan and the weighing data is "0", or if the labeled item on the weighing pan is removed and the weighing data crosses rOJ. By placing the next item on the weighing pan, regardless of the weight of the item to be weighed,
The label of the object to be weighed can be automatically issued, and furthermore, when the already labeled item is placed on the weighing pan, the next label can be prevented from being issued unless the weighing data fluctuates by ±80 g or more.

Therefore, even if the scale operates and the weighing data fluctuates due to the influence of wind or vibration when the object to be weighed is placed on the weighing pan, the amount of fluctuation in the weighing data due to the influence of wind or vibration is usually small. ±1 pulse or ±
Since the weight is about 10g, the label printer 10 will not operate and a weighing label will not be issued, so that unnecessary labels will not be issued due to the influence of wind or vibration. At the same time, by removing the object on the weighing pan and returning the weighing data to "O", it is possible to automatically issue a weighing label for items weighing less than 80 g. Labels for objects to be weighed can also be automatically issued.

In addition, in general, this type of scale equivalent to 1 pulse of 10 g has a maximum weighing value of about 10 kg to 20 kg, and usually weighs at least about 100 g or more, so in normal use, there is a method of placing the object to be weighed on the weighing pan. For example, you can place a labeled item on top of it and place the next item on it, then remove the labeled item and label the next item, making it extremely easy to handle. Allows quick labeling.

Furthermore, when the selector switch 19 is switched to the low logic (ground) level side, the NOR gate 14 is closed, the input of count pulses to the reversible counter 11 is prohibited, the counting operation of the reversible counter 11 is stopped, and the weighing data is Detection of the amount of variation in is prevented.

Therefore, in this case, the NAND gate is activated only when the parallel-to-serial converter 7 outputs a zero signal and the count content of the reversible counter 11 is preset to "8", that is, when the weighing data crosses "O". 16 NAND is established and a zero detection signal Z is output.

Therefore, when the selector switch 19 is set to the low logic (ground) level side, when the scale operates and the weighing data fluctuates, only whether or not the weighing data crosses "O" is checked. Only when the measurement data crosses rOJ, the label printer 10 can print the measurement data and automatically issue the label.

In this way, the amount of variation in the weighing data can be selectively detected by switching the changeover switch 19.
By switching the changeover switch 19, when the measurement data fluctuates, it is possible to determine whether the measurement data crosses "0" or, if it does not cross rOJ, whether the amount of fluctuation is larger than the preset amount of fluctuation. A label is issued when the weighing data crosses "0" or the variation amount is larger than a preset variation amount, and when the weighing data crosses "O". It is possible to selectively detect only whether or not the measurement data crosses rOJ, and issue a label only when the measurement data crosses rOJ.

Note that the configuration of the present invention is not limited to that of the above embodiment.

For example, in the above embodiment, the weighing data is printed when the amount of variation in the weighing data becomes larger than ±8 pulses, that is, ±80g, but the set value for this amount of variation is limited to that in the above embodiment. Rather, it may be set to an appropriate value depending on the amount of variation in measurement data due to wind or vibration.

Further, in the above embodiment, the reversible counter 11 is also used as a zero detection circuit, but the invention is not limited to this. For example, as shown in FIG. P2
4 is set by the zero signal output from the horizontal transducer 7, and reset by the differential signal of the print operation signal output from the differentiator circuit 23, so that the weighing data changes depending on the set/reset state of the flip-flop 24. 0'' is detected, and the set output of the flip-flop 24 is taken out at once as a zero detection signal Z to the variation detection signal output from the NOT circuit 18 using an OR gate 25.
It may also be input to the AND gate 22.

Furthermore, in both of the above embodiments, the zero signal output from the horizontal transducer 7 is used to detect whether or not the weighing data crosses "0". Any signal may be used as long as it is output when the current is below 0 g, that is, when the rOJ is crossed.

Furthermore, it goes without saying that the configuration of the other parts is not limited to those of the above embodiments.

As detailed above, according to the present invention, when the measurement data fluctuates, it is detected whether or not the measurement data crosses zero, and the amount of variation in the measurement data is less than the preset amount of variation. The detection signal is used to cause the printer to print the weighing data only when the weighing data crosses zero or the amount of variation is larger than a preset amount of variation. This eliminates unnecessary labels being issued due to the effects of wind or vibration, and there is no restriction on how to place the object on the weighing pan, making it very easy to handle. Easy and quick labeling is possible, and it can automatically issue labels for objects to be weighed of any weight value, and there are no restrictions on the weight value of objects to be weighed for which labels can be automatically issued. According to the present invention, it is possible to provide an extremely practical weighing printing device that does not have any problems, and according to the present invention, it is possible to cancel the printing prohibition function of weighing data within a set variation amount by switching a switch, thereby improving the versatility of weighing printing. equipment can be provided.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention;
2A and 2B are timing charts of each signal in the same embodiment, and FIG. 3 is a block diagram showing the configuration of another embodiment of the present invention. 3...Reversible counter for counting, 4...Flip-flop for up-count/down-count switching, 7...Parallel-to-serial converter, 8... Arithmetic circuit , 9...Display circuit, 10...Label printer, 11...Reversible counter, 16...
...NAND gate, 19...changeover switch,
CU... Count up pulse, CD...
...Countdown pulse.

Claims (1)

[Scope of Claims] 1. Means for counting the weighing pulse signals output from the scale section and outputting weighing data; and a printer receiving a print command and printing out the weighing data from the weighing data output means; The weighing pulse signal output from the scale unit is counted, and when the count value reaches a preset value, a fluctuation amount detection signal is output, and the count contents are cleared by the printing operation of the printer and the fluctuation amount detection signal is output. a fluctuation amount detection circuit whose output is stopped, and detecting that the weighing data in the weighing data output means has become zero and outputting a zero detection signal;
and a zero detection circuit that stops outputting the zero detection signal due to the printing operation of the printer, a timer circuit that times out when the weighing pulse signal from the scale section is not output continuously for a certain period of time, and the weighing data. non-zero detection signal output means for outputting a non-zero detection signal when the measurement data in the output means is other than zero; A weighing and printing device, characterized in that the printing command is generated when outputs of a time-up signal from a timer circuit and a non-zero detection signal from the non-zero detection signal output means match. 2 means for counting the weighing pulse signals outputted from the scale section and outputting weighing data; a printer receiving a print command and printing out the weighing data from the weighing data output means; The measuring pulse signal is counted, and when the count value reaches a preset value, a fluctuation amount detection signal is output, and the count contents are cleared by the print operation of the printer, and the output of the fluctuation amount detection signal is stopped. Zero detection which detects that the measurement data from the fluctuation amount detection circuit and the measurement data output means has become zero and outputs a zero detection signal, and stops the output of the zero detection signal by the printing operation of the printer. a timer circuit that times up when the weighing pulse signal from the scale section is not output continuously for a certain period of time; and a timer circuit that outputs a non-zero detection signal when the weighing data in the weighing data output means is other than zero. A non-zero detection signal output means and a changeover switch for prohibiting the variation detection operation of the variation detection circuit are provided, and the variation detection signal from the variation detection circuit or the zero detection signal from the zero detection circuit and the A weighing and printing device, characterized in that the printing command is generated when outputs of a time-up signal from a timer circuit and a non-zero detection signal from the non-zero detection signal output means match.